酸浸工艺强化浸出钼精矿氧化焙砂的试验研究  

Experimental Study on Enhanced Leaching of Molybdenum Concentrate Oxide Roasted Sand by Acid Leaching Process

作　　者：杨均流 刘云峰 肖桂龙 YANG Junliu;LIU Yunfeng;XIAO Guilong(BASF(China)Co.,Ltd.,Shanghai 200120,China;Norin Mining Limited,Beijing 100053,China;Echmann(Shanghai)Trading Co.,Ltd.,Shanghai 200120,China)

机构地区：[1]巴斯夫(中国)有限公司,上海200120 [2]北方矿业有限责任公司,北京100053 [3]埃赫曼(上海)贸易有限公司,上海200120

出　　处：《中国资源综合利用》2024年第8期35-37,52,共4页China Resources Comprehensive Utilization

摘　　要：钼精矿氧化焙烧后得到焙砂,焙砂的钼含量较高,但依然含有大量杂质。试验采用酸浸对钼精矿氧化焙砂进行预处理,以去除焙砂中的杂质,提高焙砂的钼含量。经条件试验,最佳工艺条件下,酸浸温度为80℃,液固比为2,酸浸时间为2h,加酸方式为一次加酸(加入足量硝酸),最终酸浸pH控制在0.5左右。此时,钼精矿氧化焙砂的铜浸出率为98.53%,钼浸出率为19.42%,铜、锌等杂质实现有效去除,钼溶出较少。酸浸渣的钼含量为55.29%,杂质金属含量较低。After oxidation roasting of molybdenum concentrate,roasted sand is obtained,which has a high molybdenum content but still contains a large amount of impurities.The experiment uses acid leaching to pretreat the oxidized roasted sand of molybdenum concentrate,in order to remove impurities in the roasted sand and increase the molybdenum content of the roasted sand.According to the experimental conditions,under the optimal process conditions,the acid leaching temperature is 80℃,the liquid-solid ratio is 2,the acid leaching time is 2 h,the acid addition method is one-time addition(adding sufficient nitric acid),and the final acid leaching pH is controlled at around 0.5.At this time,the copper leaching rate of molybdenum concentrate oxidized roasted sand is 98.53%,and the molybdenum leaching rate is 19.42%,and impurities such as copper and zinc are effectively removed,and molybdenum leaching is relatively low.The molybdenum content of the acid leaching residue is 55.29%,and the impurity metal content is relatively low.

关 键 词：钼精矿 氧化焙烧 焙砂 酸浸 预处理 强化浸出 

分 类 号：TF841.2[冶金工程—有色金属冶金]